package com.yootk;
import java.util.concurrent.atomic.AtomicReference;
class Book{
    private String title;
    private double price;
    public Book(String title,double price){
        this.title = title;
        this.price = price;
    }
    @Override
    public String toString(){
        return "【图书】名称 = " + this.title + "、价格 = " +this.price;
    }
}
public class YootkDemo13 {
    public static void main(String [] args)throws Exception{
        Book book = new Book("java就业编程实战",69.8);
        AtomicReference<Book>ref = new AtomicReference<Book>(book);
        ref.compareAndSet(book,new Book("Spring就业年初实战",67.8));
        System.out.println(ref);
    }
}
